Reamer



Patented Dec. 7, 1920.

C; P. WETMOHE.

HEAMER. APPLICATION FILED FEB. 7, 1919 acters designate the same partsin the several tit CHARLES 1P. WETMOBE,

REAMER COMPANY, CONSIN.

or MILWAUKEE, WISCONSIN, or MILWAUKEE, wrsooivsm,

ASSIGNOR TO WE'IMORE A CORPORATION OF WIS- REAMER.

memos.

specification 01 Letters Patent.

Patented Dec. 7, 1920.

Application filed February 7, 1919. Serial No. 275, 187.

To all whom. it may concern:

Be it known that I, a citizen of the United States, residing atMilwaukee in the county of Milwaukee and State of Wisconsin, haveinvented certain new and useful Improvements in Reamers, of which thefollowing is a specification, reference being had to the accompanyingdrawing, forming a part thereof.

T his invention relates to reamers having removable and adjustableblades.

The main objects of the invention are to provide for the renewal andadjustment of the blades to compensate for wear and sharpening and tovary the size of the holes reamed; to provide for reaming holes to theextreme closed ends thereof and truing the an les at the closed ends; toadvance the ends of the. blades as they are adjusted radially outward tocompensate for wear and sharpening at the ends as-well as the sides; tofacilitate removing, replacing and adjusting the blades; to rigidlysupport the blades from end to end and to securely hold them in place inthe body of the reamer; to facilitate cutting by the blades and theremoval of chips or cuttings; to provide for and facilitate theattachment of the reamer to various kinds of arbors, stems or spindlesfor use in different machines; and generally to improve the constructionand operation of reamers of this class.

The invention consists in the construction, arrangement and combinationof parts as hereinafter particularly described and pointed out in theclaims.

In the accompanying drawing like charfigures.

Figure 1 is embodying the invention and a part of an arbor with which itis detachably connected, the coupling sleeve being partially brokenaway; Fig. 2 is an end elevation as viewed from the right relative toFig. 1; Fig. 3 1S a longitudinal section cutting opposite blade groovesin the body and showing blades inserted and secured therein; Fig.4 is asimilar section of the reamerjbody without the blades, couplingsleeveand collars; and Fig.

5 is a side elevation of a blade.

The reamer comprises a cylindrical" body with a reduced externallythreaded shank 7), and in' the other end with an annular coaxial socket0, having its CHARLES P. WE'rMouE,

a side elevation. of a reamer' and 'm, to compensate as shown in Figs.1,

outer wall threaded and its inner wall plain. It is also formed withlongitudinal grooves d, the bottoms of which are inclined outwardly oraway from its axis toward the socket c, as shown in Figs. 3 and 4. Thesegrooves, which in cross section are approxi-.

mately radial to the axis of the reamer, are disposed obliquely thereto,receding or retreating relative to the directlon of rotation for cuttingtoward the socket c, which they intersect, as shown in Figs. 1 and 2.

Tapered blades f, removably fitted and adjustable lengthwise in thegrooves d in engagement with the inclined bottoms thereof, are formed attheir narrow or front ends with internal undercut beveled notches 9,approximately coinciding with the socket 0 when the blades are assembledin the body a, and are beveled at their back or wide ends as shown at hin'Figs. 3 and 5.

The faces of the blades adjacent to their front ends are-concaved on oneside next to their outer cutting edges, as shown at j, in Figs. 1 and 2,to form more acute angles and provide freer and betterv clearance forthe chips and cuttings along those portions of the blades which aresubjected to the greatest duty. I

A collar 1, threaded on the shank b, is formed on one side with anannular beveled face adapted to engage with the. beveled back ends it oftheblades, and a collar or nutm, externally threaded to enga e with theinternal thread in the outer wad? of the socket c, is formed on one sidewith an annular beveled face adapted to engage with the undercut beveledends or shoulders of the notches g in the front ends of the blades, asshown in Fi 3. The blades are thus adjustably and rmly held in place inthe grooves (Z of thebody, neously advanced lengthwise toward the frontend of the body and thrust radially outward by the adjustment of thecollars Z for wear and sharpening and to vary the size of holes reamedtherewith.

The collars are formed with slots 0 and p,

2 and 3, to adjust them with spanners for removing, replacing andadjusting the blades. 7 1

he t readed shank 71 of the reamer is provided with a coupling sleever,=by means and may be simultaends of the blades inserted and heldtherein.

The central part or solid boss of the body a in which the front seat uis formed, is flush with the annular end portion of the 1 body outsideof the socket 0, so that the seat is exposed and readily accessible to acenter for grinding, truing or sharpening the blades when they areassembled and secured in place in the grooves of.

The oblique or inclined arrangement of the grooves (Z relative to theaxis of the reamer, causes the blades to make ya draw cut and to workeasier and smoother.

The inclination of the bottoms of the grooves J away from the axis ofthe body toward the socket 0, with which they intersect at their frontends, causes the bladesas they are adjusted radially outward to beadvanced lengthwise toward and beyond the front end of the body a sothat as their-outer edges are worn and ground away, their protrudingfront ends may be cut or ground away and trued to maintain true anglesor corners between them and the longitudinal 3 cutting edges, forcompletely reaming holes and forming true angles or corners at theirclosed ends.

Along the grooves (Z next to the cutting sides of the blades 7", thebody a is grooved 40 or cut away, as shown at 'w in Figs. 1 and 2,

to afford freer clearance for chips or cuttings. 1

As shown in Fig. 2, the front end of the body a and the front face ofthe collar m are provided with an index and graduation marks tofacilitate adjusting and setting the blades.

Various modifications in the minor details of construction andarrangement of e parts of the reamer may be made, withoutdeparture fromthe essential principle and scope of the invention as defined in thefollowing claims.

I claim:

1. A reamer comprising a body formed with a reduced threaded shank atone end, a coaxial annular threaded socket and a central solid bosswithin the socket at the other end, and longitudinally grooves havingbottoms inclined outwardly toward the socket tapered blades ofsubstantially uniform thickness fitting in said grooves against theinclined bottoms thereof and 'having beveled back ends andinternalunderc'ut beveled notches in the front ends;

and collars threaded on the shank and in the socket and having beveledfaces adapted to engage the beveled ends and notches of the blades andto adjustably confine the blades in the body. '70

2. A reamer comprising a body formed with a threaded shank at one end,a' coaxial annular threaded socket and a central boss within the socketat the other end, and obliquely disposed longitudinal grooves havingbottomsinclined outwardly toward the socket; tapered blades ofsubstantially. uniform thickness fitting in said grooves against theinclined bottoms thereof and having beveled back ends and internalundercut beveled notches in the front ends;

and collars threaded on the shank and in the socket, and having beveledfaces adapted to engage the beveled ends and notches of the blades andconfine the blades in the 8 body. I

3. A reamer comprising a body formed with a reduced externally threadedshank at one end, a coaxial annular socket having its outer wallthreaded and a central boss within the socket at the other end, andlongitudinal grooves of substantially uniform width having bottomsoutwardly inclined toward the socket; tapered blades of substantiallyuniform thickness fitting in said grooves against the inclined bottomsthere of and having beveled back ends and internal undercut bevelednotches in the front ends; and collars threaded on the shank and in thesocket and having beveled faces adapted to engage the beveled ends andnotches of the blades.

4. A- reamer comprising a body formed with a threaded shank at one end,a coaxial annular threaded socket and a central boss within the socketat the other end, 1ongitudinal grooves having their bottoms inclinedoutwardly from the axis of the reamer toward the socket; and centerseats in the ends; tapered blades fitting in the grooves against theinclined bottoms thereof and having beveled back ends and internalundercut beveled notches in the front ends, and collars threaded 0n theshank and in the socket and having beveled annular faces adapted toengage the beveled ends and notches of the blades.

5. A reamer comprising a substantially cylindrical body formed with athreaded shank at one end, a coaxial annular socket 'and a centralcylindrical boss within the socket at the other end, radiatinglongitudinal blade grooves and clearance grooves along the leading sidesof the blade grooves, blades fitting in the blade grooves and'havingbeveled back ends and internal undercut beveled notches in the frontends corresponding with the socket, the leading faces of the bladesbeing concaved adjacent their front ends and forming sharp cuttingedges. 139

at the sides, and collars threaded on the shank and in the. socket andhaving beveled annular faces adapted to engage the beveled ends andnotches of the blades.

6. A reanier' comprising a body formed with a threaded shank at one end,an annu lar socket and a central cylindrical boss Within the socket atthe other end, and radiating longitudinal grooves having inclinedbottoms, tapered blades fitted in the grooves with their inner edgesagainst the inclined bottoms thereof and having beveled back ends andinternal undercut beveled notches in the front ends, and collarsthreaded on the shank and in the socket and having beveled annular facesadapted to engage the beveled ends and notches of the blades, theexposed front end of thebody and outer face of the front collar havingindex and graduation marks for predetermined adjustment of the blades.

In Witness whereof I hereto affix my Sig nature.

CHARLES P. WETMORE.

